2 Relay Module Wiring
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![Home automation using NodeMCU and Blynk App - WiFi Relay Module](https://i2.wp.com/easyelectronicsproject.com/wp-content/uploads/2020/05/NodeMCU-Relay-module-circuit-1.jpg)
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5v 4 channel relay module four-channel relay module
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![arduino - Switching a relay from its supply (2 Relay Module, VCC to IN1](https://i2.wp.com/i.stack.imgur.com/4hazY.jpg)
![HOW TO INTERFACE 5V 4 CHANNEL RELAY MODULE WITH ARDUINO - YouTube](https://i.ytimg.com/vi/sWiflR1LzV8/maxresdefault.jpg)
![Control 12V Lamp via SMS with Arduino | Random Nerd Tutorials](https://i2.wp.com/randomnerdtutorials.com/wp-content/uploads/2017/10/connect-relay-12-V-lamp.jpg?resize=1880%2C1120&ssl=1)
![Fab Academy 2018 | Output Devices](https://i2.wp.com/fab.academany.org/2018/labs/fablabirbid/students/nadine-tuhaimer/img0011/Arduino_KY-019_5v_relay_module_connections.png)
![Wiring/controlling 4 channel relay with Raspberry Pi 2b+ - Electrical](https://i2.wp.com/i.stack.imgur.com/rPwa5.jpg)
![5V Dual Channel Relay Module Pinout, Working, Interfacing with Arduino](https://i2.wp.com/microcontrollerslab.com/wp-content/uploads/2021/01/5V-Dual-Channel-Relay-Module-pinout-diagram.jpg)
![hardware - Using single 5V relay (jqc-3ff-s-z) - safety advice required](https://i2.wp.com/i.stack.imgur.com/TWLit.jpg)